title: Synthesis and optimization ring opening of monoepoxide linoleic acid using p-toluenesulfonic acid.
abstract: Biolubricant base oils, 9,12-hydroxy-10,13-oleioxy-12-octadecanoic acid (HYOOA) was synthesized based on the esterification reaction of Monoepoxide linoleic acid 9(12)-10(13)-monoepoxy 12(9)-octadecanoic acid (MEOA) with oleic acid (OA) and catalyzed by p-Toluenesulfonic acid. The optimum conditions for the experiment using D-optimal design to obtain high yield% of 84.61, conversion% of 83.54 and lowest OOC% of 0.05 were predicted at OA/MEOA ratio of 0.2:1 (mol/mol), PTSA/MEOA ratio of 0.4:1 (mol/mol), reaction temperature at 110°C, and reaction time at 4.5 h. The FTIR peaks of HYOOA indicate the disappearance of the absorption band at 820 cm(-1), which belongs to the oxirane ring. (13)C and (1)H NMR spectra analyses confirmed the result of HYOOA with appearance carbon-ester (C = O) chemical shift at 174.1 ppm and at 4.06 ppm for (13)C and (1)H NMR respectively.
authors.affiliation: School of Chemical Sciences & Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi Selangor, Malaysia.
authors.forename: Jumat
authors.initials: J
authors.lastname: Salimon
authors.forename: Bashar Mudhaffar
authors.initials: BM
authors.lastname: Abdullah
authors.forename: Rahimi M
authors.initials: RM
authors.lastname: Yusop
authors.forename: Nadia
authors.initials: N
authors.lastname: Salih
authors.forename: Emad
authors.initials: E
authors.lastname: Yousif